12011122201 has 6 divisors (see below), whose sum is σ = 13006126590. Its totient is φ = 11087189568.

The previous prime is 12011122199. The next prime is 12011122219. The reversal of 12011122201 is 10222111021.

It can be written as a sum of positive squares in 3 ways, for example, as 954810000 + 11056312201 = 30900^2 + 105149^2 .

It is not a de Polignac number, because 12011122201 - 2¹ = 12011122199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011122601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35535696 + ... + 35536033.

It is an arithmetic number, because the mean of its divisors is an integer number (2167687765).

Almost surely, 2^12011122201 is an apocalyptic number.

It is an amenable number.

12011122201 is a deficient number, since it is larger than the sum of its proper divisors (995004389).

12011122201 is an equidigital number, since it uses as much as digits as its factorization.

12011122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71071755 (or 71071742 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011122201 its reverse (10222111021), we get a palindrome (22233233222).

The spelling of 12011122201 in words is "twelve billion, eleven million, one hundred twenty-two thousand, two hundred one".